Greetings......I have mounted a new Yamaha F25 (135lb) on a Maxxon 12'
inflatable rescue type
boat. The problem is, the
boat is not going anywhere unless you're going snail speed. As soon as you give it a little more
power, there's huge cavitation to a point that the boat STOPS. Dealer said to raise the
motor. The CAV plate is level with
keel and NOTHING changed. The boat is new but old stock and I made 3/4
plywood floor decking for her thinking it would help. It did but very insignificant. Would change the prop/pitch help??
Motor came with a 9 7/8 X 11 1/4 prop from factory. Even weighing down the bow and shifting things around, still is a no-go.
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